Add CDS version to ensembl flat

[vinay-ebi]

Description

The spec for the GFF files says there is a “version” tag on the CDS for the protein version, but it is not added to GFF files.
(e.g. here is a line from GRCh38.111.gff3 with protein_id but no version:1 havana CDS 65565 65573 . + 0 ID=CDS:ENSP00000493376;Parent=transcript:ENST00000641515;protein_id=ENSP00000493376).
On the browser, this protein ID is ENSP00000493376.2 in 111 (http://jan2024.archive.ensembl.org/Homo_sapiens/Transcript/ProteinSummary?db=core;g=ENSG00000186092;r=1:65419-71585;t=ENST00000641515) and 112 (https://may2024.archive.ensembl.org/Homo_sapiens/Transcript/ProteinSummary?db=core;g=ENSG00000186092;r=1:65419-71585;t=ENST00000641515)

The README file mentions version: (https://ftp.ensembl.org/pub/release-112/gff3/homo_sapiens/README)CDS

ID: Unique identifier, format “CDS:<protein_stable_id>”
Parent: Transcript identifier, format “transcript:<transcript_stable_id>”
protein_id: Ensembl protein stable ID
version: Ensembl protein version

Benefits

• Having CDS version to gff3 and other formats

Possible Drawbacks

None

Testing

No changes. Test suite could run successfully

[sgiorgetti]

@vinay-ebi @nwillhoft - the builds are failing because of missing copyright update.
Asked @TamaraNaboulsi to do it ... if in a rush, please coordinate with her. Thx